US 5,478,228 AGranted

Apparatus for making a zipper for a reclosable thermoplastic bag

AssigneeDowbrands L.P.

InventorsBrian C. Dais, Jose Porchia, John O. McCree, Raymond R. Rydman, Bertha R. Vaughn

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Abstract

Disclosed is a zipper for a reclosable thermoplastic bag having opposing rib and groove profiles wherein at least one of the opposing zipper profiles has an longitudinally extending part interlockable and substantially free of interdigitation with the opposing profile and wherein the part is structurally discontinuous along its length. When the rib and groove profiles are interlocked, an audible clicking sound and/or a vibratory or bumpy feel perceptible to the touch is imparted. Further disclosed is a process and apparatus for making the zipper wherein a zipper profile is extruded and indentions are formed within and along it.

Claims4

Dependent claims

An apparatus for providing a longitudinally extending zipper with indentations for a thermoplastic reclosable bag, comprising:

(a) a means for receiving a longitudinally extending first zipper profile having a longitudinally extending part interlockable with a longitudinally extending opposing second zipper profile;
(b) a means for aligning the first profile in a fixed position;
(c) a means for removing portions of a longitudinally extending bulbous head interlockable with the second profile, wherein the means for removing portions of the bulbous head comprises a means for intermittently laterally punching out portions of the head such that upon interlocking the profiles the indentations within the part are substantially free of interdigitation.

Dependencies are inferred from the claim text.

Facts

Application: 08/152,515Filed 16 Nov 1993 · continuation
Priority: 9 Mar 1990
Granted: 26 Dec 1995
Term ends: Not estimatedThe source records don’t support an estimate.

Classification25 codes

B65D 33/2558
Characterised by the slide fastener, e.g. adapted to interlock with a sheet between the interlocking members having sections of particular shape:…
B26F 1/12
Perforating by punching, e.g. with relatively-reciprocating punch and bed: to notch margins of work
B29C 67/0044
Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00: for shaping edges or extremities
B29C 67/0048
Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00: local deformation of formed objects

Family

Serial491,389Parent of this continuation-in-part · filed 9 Mar 1990
Serial531,951Parent of this division · filed 1 Jun 1990
Serial761,125Parent of this continuation · filed 17 Sep 1991
US 5,307,552 AParent of this continuation
US 5,070,584 AParent of this division
US 5,478,228 AThis patent

From the US filing history. Foreign family members aren’t listed.